docs: def get_single_generation(self, table, db='default'):
          """Creates a random generation value for a single table name"""
          key = self.keygen.gen_table_key(table, db)
          val = self.cache_backend.get(key, None, db)
          #if local.get('in_test', None): print force_bytes(val).ljust(32), key
          if val is None:
              val = self.keygen.random_generator()
              self.cache_backend.set(key, val, settings.MIDDLEWARE_SECONDS, db)
          return val